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Topology Editing using ArcView (now called Basic) license level of ArcGIS Desktop?

Topology Editing using ArcView (now called Basic) license level of ArcGIS Desktop?


I am building a geodatabase from data collected on a GPS handheld in the field.

The GPS device collects decently accurate information but I need to make sure all the polygons, lines, and points are aligning correctly.

I currently have the an Arcview license and don't believe I can create my own topology.

Is there any work around or extension that I can download, instead of upgrading my ArcGIS license to create and edit the topology in this way?


To work with topology using a Basic (formerly called ArcView) level license you can use map topology on your file geodatabase:

A map topology creates topological relationships between the parts of features that are coincident, which allows you to simultaneously edit features that share geometry. You can create a map topology for point, line, or polygon layers from shapefiles or geodatabase feature classes. The features can be in one or more layers and have different layer types.

It is easy to create a map topology. You simply choose the layers to participate and set the cluster tolerance. In addition, if you click the Topology Edit tool without having an active topology, you are prompted to set up the topology.

Standard/Advanced level licensing is only required when wanting to store topological relationships in your geodatabase. Your requirement seems to be only for topology editing rather than storage.


ArcGIS

ArcGIS is a suite consisting of a group of geographic information system software products produced by ESRI. At the desktop GIS level, ArcGIS can include: ArcReader, which allows one to view and query maps created with the other Arc products ArcView, which allows one to view spatial data, create maps, and perform basic spatial analysis ArcEditor which, in addition to the functionality of ArcView, includes more advanced tools for manipulation of shapefiles and geodatabases or ArcInfo which includes capabilities for data manipulation, editing, and analysis. There are also server-based ArcGIS products, as well as ArcGIS products for PDAs. Extensions can be purchased separately to increase the functionality of ArcGIS.


Ⓘ ArcEditor is the midlevel software suite designed for advanced editing of spatial data published in the proprietary Esri format. It is part of the ArcGIS produc ..

ArcEditor is the midlevel software suite designed for advanced editing of spatial data published in the proprietary Esri format. It is part of the ArcGIS product. It provides tools for the creation of map and spatial data used in Geospatial Information Systems. ArcEditor is not intended for advanced spatial analysis, which can be performed using the highest level of ArcGIS, ArcInfo.

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ArcScan Tutorial. Copyright Esri All rights reserved.

3 Exercise 1: Interactive vectorization ArcScan makes it easy to create new features from scanned raster images. This process can significantly reduce the time it takes you to incorporate raster data into your vector database. Complexity: Beginner Data Requirement: ArcGIS Tutorial Data Setup In this exercise, you will generate features from a scanned parcel map by interactively tracing raster cells. You will begin by starting ArcMap and loading a map document that contains the raster dataset and two layers. Setting up the ArcScan environment Prerequisite: You need to have the ArcScan for ArcGIS extension installed and registered. In addition, start ArcMap and add the Editor and ArcScan toolbars to the display. Steps: 1. Click the Open button on the Standard toolbar. 2. Navigate to the ArcScanTrace.mxd map document in the ArcScan directory where you installed the tutorial data and select it (C:ArcGISArcTutor is the default location). 3. Click Open. 4. To use ArcScan, you need to enable the extension. Click the Customize menu, click Extensions, check ArcScan, then click Close. 5. Raster layers must be symbolized as two-color images to use the ArcScan tools and commands. You will change the raster symbology from stretched to unique values. Right-click the ParcelScan.img raster layer in the ArcMap table of contents and click Properties. The Layer Properties dialog box appears. 6. Click the Symbology tab on the Layer Properties dialog box. 7. Click Unique Values in the Show box. 8. Click OK. Setting the raster snapping environment ArcScan is designed to work in conjunction with the ArcMap editing environment and is only active when an edit session has been started. You need to set some options for snapping while editing and using ArcScan. Copyright Esri. All rights reserved. 3

4 Steps: 1. Click the Editor menu and click Options. ArcScan uses the classic editing snapping environment rather than the Snapping toolbar. 2. Click the General tab. 3. Check Use classic snapping. When you enable classic snapping, it disables the Snapping toolbar's snapping environment for use in editing. Therefore, once you have completed your work with ArcScan, you should reenable the Snapping toolbar by unchecking the Use classic snapping box. 4. Click OK. The ArcScan extension is only active in an edit session. The Start Editing command allows you to begin an edit session. 5. Click the Editor menu on the Editor toolbar and click Start Editing. 6. Choose to start editing on the file geodatabase workspace and click OK. Raster snapping requires settings that influence the behavior of the tracing. These options are set on the Raster Snapping Options dialog box. 7. Click the Raster Snapping Options button on the ArcScan toolbar to open the Raster Snapping dialog box. 8. Set the maximum line width value to 7. This setting will ensure that you are able to snap to raster cells that represent the lot boundaries. Copyright Esri. All rights reserved. 4

5 9. Click OK. 10. Click the Editor menu, point to Snapping, then click Snapping Window. 11. Click the plus sign next to Raster to expand it. 12. Check the Centerlines and Intersection options for raster snapping. You can close the window when you are done. Now, you need to turn on SnapTips, which are pop-up messages that give you information on the type of snapping that is active as you move your pointer around the map. 13. Click the Editor menu, point to Snapping, then click Options. 14. Check Show SnapTips. 15. Click OK. Creating line features by tracing raster cells Now that you have set up your raster snapping environment, you are ready to begin tracing the raster cells. You will use the Vectorization Trace tool for this step. Copyright Esri. All rights reserved. 5

6 Steps: 1. Click Bookmarks and click Trace lines to set the current view to the edit area of the exercise. When the display refreshes, you should see the trace area. 2. Click the ParcelLines line feature template in the Create Features window. This sets up the editing environment to create new features in that layer using the default attributes for that template. 3. Click Vectorization Trace tool on the ArcScan toolbar. 4. Move the pointer until it snaps to the intersection of the lot boundaries and click to start tracing. Copyright Esri. All rights reserved. 6

7 5. Point the Vectorization Trace tool downward and click to start creating the line feature. 6. Continue to point and click with the Vectorization Trace tool to trace the exterior boundary of the lots. Copyright Esri. All rights reserved. 7

8 7. Once you have finished tracing around the lot boundaries, press F2 to finish the sketch. A line feature now represents the exterior boundaries of the scanned parcel lots. Copyright Esri. All rights reserved. 8

9 Creating polygon features by tracing raster cells Now that you have successfully traced raster cells to create line features, you will create polygon features using the Vectorization Trace tool. Steps: 1. Zoom to the bookmarked extent called Trace polygons to get a better view of the area that will be traced. Click Bookmarks and click Trace polygons. 2. Click the ParcelPolygons polygon feature template in the Create Features window. You must change the active feature template to ParcelPolygons to create polygon features while tracing. 3. Click the Vectorization Trace tool on the ArcScan toolbar. 4. Move the pointer until it snaps to the lower-left corner of lot 061 and click to start tracing. 5. Point the arrow toward the lower-right corner of the lot and click to start creating the segments of the polygon feature. Copyright Esri. All rights reserved. 9

10 6. Continue to trace the lot boundary in a counterclockwise direction. 7. When the cursor has returned to the starting point of the trace, press F2 to complete the polygon. Once you have finished tracing the raster cells, you can stop editing and complete the exercise by saving your edits. 8. Click the Editor menu on the Editor toolbar and click Stop Editing. 9. Click Yes to save your edits. 10. To continue to the next exercise in the ArcScan tutorial, click Exercise 2: Automatic vectorization. Copyright Esri. All rights reserved. 10

11 In this exercise you learned how to set the raster snapping options and environment, snap to raster cells, and trace raster cells to create new line and polygon features. These steps covered the main components of the raster tracing process. The next exercise will show you how to edit a raster layer and automatically generate features for an entire raster layer using the batch vectorization tools. Copyright Esri. All rights reserved. 11

12 Exercise 2: Automatic vectorization In this exercise, you will edit a scanned parcel map to remove cells from the raster that are not in the scope of the vectorization. Once the raster has been cleaned up, you will generate features using the batch vectorization mode. You will begin by starting ArcMap and loading a map document that contains the raster dataset and two shapefiles. Complexity: Beginner Data Requirement: ArcGIS Tutorial Data Setup Setting up the ArcScan environment Prerequisite: This exercise builds on the ArcMap settings specified in the previous exercise. You need to have the ArcScan extension enabled, classic editing snapping enabled, and the ArcScan and Editor toolbars displayed. Steps: 1. Click the Open button on the Standard toolbar. 2. Navigate to the ArcScanBatch.mxd map document in the ArcScan directory where you installed the tutorial data and select it (C:ArcGISArcTutor is the default location). 3. Click Open. If you still have the map document open from the previous exercise and are prompted to close it, do so without saving your changes. 4. Raster layers must be symbolized as two-color images to use the ArcScan tools and commands. You will change the raster symbology from stretched to unique values. Right-click the ParcelScan.img raster layer in the ArcMap table of contents and click Properties. The Layer Properties dialog box appears. 5. Click the Symbology tab on the Layer Properties dialog box. 6. Click Unique Values in the Show box. 7. Click OK. Preparing the raster for vectorization: Raster painting When performing batch vectorization, it is sometimes necessary to edit the raster image prior to generating features. This process is referred to as raster cleanup and involves the removal of unwanted cells from the Copyright Esri. All rights reserved. 12

13 raster image that are not in the scope of the vectorization. ArcScan provides the tools to perform raster cleanup. You will now use the Raster Cleanup tools to remove unwanted text from the ParcelScan image. Steps: 1. Click Bookmarks and click Raster cleanup to set the current view to the edit area of the exercise. 2. Click the Editor menu on the Editor toolbar and click Start Editing. 3. Choose to start editing on the file geodatabase workspace and click OK. 4. On the ArcScan toolbar, click the Raster Cleanup menu and click Start Cleanup to start the raster cleanup session. 5. Click the Raster Cleanup menu and click Raster Painting Toolbar to display the Raster Painting toolbar. 6. Click the Erase tool on the Raster Painting toolbar. 7. Click and hold to erase the text (59.96) located at the top of the parcel lot. Copyright Esri. All rights reserved. 13

14 8. Continue to erase the text with the Erase tool until it has been completely removed from the image. In addition to the Erase tool, the Raster Painting toolbar supports another tool designed to erase cells. This tool is called the Magic Erase tool, and it allows you to erase a series of connected cells by simply clicking or dragging a box around them. 9. Click the Magic Erase tool on the Raster Painting toolbar. 10. Drag a box around the text (001) located in the center of the parcel lot to remove it. The text is now removed from the raster. Copyright Esri. All rights reserved. 14

15 Preparing the raster for vectorization: Cell selection In the previous steps, you learned how to use the Erase and Magic Erase tools to remove unwanted cells from the raster image. However, if the image you are working with requires much cleanup, these techniques could be time consuming. To help streamline this process, you can use the cell selection tools in conjunction with the raster cleanup tools. Steps: 1. Zoom to the bookmarked extent called Cell selection to get a better view of the edit area. Click Bookmarks and click Cell selection. 2. Click the Cell Selection menu and click Select Connected Cells. 3. In the Select Connected Cells dialog box, type a value of 500 for the total area of raster pixels. This expression will select all the cells that represent text in the raster. Copyright Esri. All rights reserved. 15

16 4. Click OK. The cells that represent the text in the raster are now selected. 5. Click the Raster Cleanup menu and click Erase Selected Cells to delete the selected cells. The selected cells are now erased. Copyright Esri. All rights reserved. 16

17 Specifying the vectorization settings Batch vectorization relies on user-defined settings, which influence the geometry of the generated features. These settings can vary depending on the type of raster data you are working with. Once you have determined the appropriate settings for your raster, you can save them within the map document or to a separate file. You will use the Vectorization Settings dialog box to apply the settings. Steps: 1. Click the Vectorization menu and click Vectorization Settings to open the Vectorization Settings dialog box. You will now modify the vectorization settings to ensure optimal results when generating features. 2. Change the Maximum Line Width value to Change the Compression Tolerance value to Click Apply to update the settings. Copyright Esri. All rights reserved. 17

18 5. Click Close. Generating features ArcScan provides a way to preview the batch vectorization prior to generating features. This can help you save time by allowing you to see how the settings will affect the vectorization. When the settings are changed, the preview can be updated by clicking the Apply button located on the Vectorization Settings dialog box. This design allows you to fine-tune the vectorization settings. The final step in the batch vectorization process is to generate features. The Generate Features dialog box allows you to select the vector layers that will store the new features and execute the vectorization. Steps: 1. Click the Vectorization menu and click Show Preview. The vectorization preview is displayed on the map. 2. Click the Vectorization menu and click Generate Features. 3. Click the ParcelLinesBatch feature template, if it is not already the active line feature template. Copyright Esri. All rights reserved. 18

19 4. Click OK. 5. Right-click the ParcelScan.img raster layer in the ArcMap table of contents and click Zoom To Layer to view all the new features that were generated. When the display refreshes, you should see the vector features that now represent the raster cells. Once you have finished generating features, you can stop editing and complete the exercise by saving your edits. 6. Click the Editor menu on the Editor toolbar and click Stop Editing. 7. Click Yes to save your edits. 8. If prompted to save your raster cleanup edits, click No. 9. You can close the map document (you do not need to save your changes) and ArcMap when you are done. Copyright Esri. All rights reserved. 19

20 You have now completed the ArcScan tutorial. In this exercise, you learned how to use the raster cleanup and cell selection tools to edit a raster layer, apply vectorization settings, preview the vectorization, and generate features. These steps covered the major components of the batch vectorization process. Copyright Esri. All rights reserved. 20


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How To: Create polygons from points in ArcGIS Pro

  • Use the Aggregate Points tool from the Cartography toolbox to create polygons around clustered points located within a specific aggregate distance
  • Click Analysis > Tools to open the Geoprocessing pane in ArcGIS Pro
  • Search for the Aggregate Points (Cartography) tool and click it
  • Configure the parameters in the Aggregate Points pane.

Converting points to lines or polygons—ArcMap

  • The Production Points To Line Or Polygon tool allows you to generate a linear or polygon feature from a selected set of points depending on the selected template
  • For example, you can load a set of collected points from a global positioning system (GPS) unit into ArcGIS and use this tool to create polyline or polygon features from those points.

Creating a simple polygon—ArcMap Documentation

  • Choose Polygon (Simple) in the list on the Functions tab
  • Define a coordinate for the start point of the polyline by doing one of the following: Click the Pinprick tool on the Production Feature Builder toolbar and click the map Type the coordinates in the cells on the Input tab in the Coordinates area.

Draw Polygon—Community Analyst Documentation

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  • Click Polygon. Place the pointer on the map and click the location of the first point to start drawing
  • Move the pointer to the next point and click
  • Continue clicking at each corner of the shape until you have created the polygon.

How To: Convert polygon features to point features with an

  • In ArcMap, click the Search button, and search for the Add Geometry Attributes tool
  • Click the Add Geometry Attributes tool to open the Add Geometry Attributes dialog box
  • For Input Features, select the polygon layer from the drop-down menu
  • For Geometry Properties, check the desired properties from the given selection.

Create points, lines, and polygons using CIMSymbols

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  • Create points, lines, and polygons using CIMSymbols
  • As of the 4.16 release, the ArcGIS API for JavaScript now supports point, line and polygon CIM symbols in 2D MapViews
  • CIM symbols are high-quality, scalable vector symbols for displaying features and graphics that are precisely displayed at any zoom level without blurriness.

Create polygons that group certain number of points in ArcGIS

  • I have about 20000 points and I want to create polygons where each polygon contain 200 points, so there should be 20000/200=100 polygons
  • I want to do that with ArcGIS 10.4.

Create polygon features—ArcGIS Pro Documentation

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In the Features group, click Create. In the pane, choose a polygon feature template, and click Regular Polygon. To change the number of sides the tool creates, click the Active template button, click the Regular Polygon tool icon, and type the numeric value.

Aggregate Points (GeoAnalytics)—ArcGIS Pro Documentation

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  • Only polygons that contain points will be returned, and resulting polygons will be completely removed from the result layer
  • The input point and polygon features (left) and the resulting area features (right) from Aggregate Points are shown
  • The most basic aggregations will calculate a count of the number of points in each polygon.

Dynamic Aggregate Points within Polygon Features for

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  • Double-click the package file that you downloaded to open in ArcGIS Pro
  • The Crimes map contains (1) a point layer representing crime locations and (2) a polygon layer for police districts
  • The Crime layer has a field, PDDistrict, that will be used to join crime locations to police districts.

Tutorial – Creating a regular grid for point sampling

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  • This tutorial describes how to use the fishnet, clip, and optionally the buffer tools in ArcGIS 10 to generate a regularly-spaced grid of sampling points inside a polygon layer
  • The steps below should work with any license level: ArcGIS for Desktop Basic (ArcView), ArcGIS for Desktop Standard (ArcEditor), and ArcGIS for Desktop Advanced

Importing data from excel to create polygons

  • If you have a list of lists of point objects (ie xy pairs) you can construct polygons using the following
  • The construction of the point objects will depend on the nature of your input data, and is left for elsewhere output_shp - an output file name including path SR - a spatial reference object

How to add Point Data and to create Thiessen Polygon in ArcGIS

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Here in this video you will come to know how to add a point data containing latitude and longitude (X-Y Coordinate) and later how to create thiessen polygon.

Digitization in ArcGIS Pro

Creating Points, Lines and

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This is a video which illustrates the digitization of points, lines and polygons in ArcGIS Pro and briefly introduces symbology.Download ArcGIS Pro Trial her

ArcGIS Toolbox – Create Points at Corners of Polygon with

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  • ArcGIS Toolbox – Create Points at Corners of Polygon with ArcPy
  • The Create Grid Corner Points tool creates a point at each corner on an input polygon feature class
  • Provides the option to add midpoints for each side of the polygon
  • The output Point feature class will
  • Contain a field called PolygonOID which contains the OID of the

A step-by-step guide to: Collector for ArcGIS

  • To record a polygon feature, tap on a polygon layer
  • To draw a polygon tap on (on the top toolbar)
  • To start the polygon either tap on the map where you want the polygon to start, or tapto start the polygon at your current location
  • To add additional vertices to your …

Using ArcGIS Pro: Creating Points from Coordinates

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  • create a point shapefile, save within a folder and not a File Geodatabase, in which case the
  • File Geodatabases are useful for consolidating many features (i.e
  • polygons, points, and/or lines) into one location
  • Shapefiles are independent files that

Fill gaps in your data with areal interpolation Learn ArcGIS

  • Create polygons from the interpolation
  • The interpolation you created is continuous and ignores the polygon outlines
  • Geostatistics has smoothed the demographic data to create a gradual surface
  • While it may not match known data precisely, smooth interpolations like this are often better at predicting unknown values.

Draw and paint—ArcGIS GeoPlanner Documentation

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  • Draw Point —Used to create points on mouse click
  • Draw Freehand Polyline —Create lines following mouse movement
  • Draw Polyline —Create lines following mouse clicks
  • Draw Freehand PolygonCreate polygons following mouse movement
  • Draw Auto-Completed Freehand PolygonCreate freehand polygons that adjoin each other

How to calculate the centroid of a polygon in ArcGIS:

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  • Find the tool called the “Feature to Point” using the Search box on ArcGIS 10.x
  • Or it is located under “Data Management Tools”

How to generate random points in ArcGIS Geographic

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  • A one-page tutorial on generating random points is available here, or see below
  • It applies to ArcGIS 9.x and 10
  • Generating Random Points in ArcGIS A) Prepare a map document in ArcMap
  • Add any layers you need, including a polygon layer in which you would like to generate random points

Add a point, line, and polygon ArcGIS Runtime API for Qt

  • A polygon graphic is created using a polygon and a fill symbol
  • A polygon is defined as a sequence of points that describe a closed boundary
  • Create a Polygon and a SimpleFillSymbol
  • To create the Polygon, create a new PointCollection with a SpatialReference and use PolygonBuilder to add new Point s to it.

How to Create Polygon from Points in QGIS GIS Tutorial

  • Select the input point layer (Tenement_block layer)
  • And then, select the Node in the Order field
  • BlockID is used as the group field
  • By doing this, we will tell QGIS to create polylines and group them using BlockID
  • Also, the lines will be created based on the order field ( Node) Now, we will create polygons from this path layer we just created.

Digitizing in ArcMap – GIS Tutorial

  • Digitizing in ArcMap In this tutorial I will highlight the basic steps for performing onscreen digitizing of map features in ArcMap
  • Objectives Creating geodatabase Creating feature dataset Creating feature class ( point, line, and polygon) Digitize features on a map/satellite image Preambles Creating a Personal Geo-database Using ArcCatalog Launch the ArcCatalog.

Sachal Zahid: Creating Polylines from Point Data in ArcGIS

  • Or, If I say, creating polygon from point data, most of GIS users would agree with me regarding the possible challenges in doing so, using ArcGIS solely
  • However, in practice we do need to create line entity from point entity
  • For example, if we have the start and end coordinates of a fluid pipeline ( e.g
  • Water, oil, or gas supply line) and we

How to Clip Point and Polygon Features in ArcGIS Pro

  • This blog post explains how to use the Clip tool in ArcGIS Pro, using some example data
  • The Extract geoprocessing tools offers a set of filter tools to work with subsets of spatial data
  • Often, the tools require SQL expressions to select features and attributes in a feature class or table
  • The output features and attributes are stored in a feature class or table, that can be the starting

Draw and Edit Feature Class in ArcGIS Pro Environmental

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  • Use the walkthrough below to learn how to draw your own polygon and create an editable feature class in ArcGIS Pro
  • Vocabulary: Feature Class-A single feature or group of features used to represent an area or point in ArcGIS
  • Typically, they are either points, lines, or polygons
  • Feature classes come in many different file types.

In ArcGIS, how do I add individual GPS points to an

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  • In ArcGIS, you can use data collected from a GPS device to create a shapefile containing points, lines, or polygon features
  • For more about shapefiles, see Shapefile in Wikipedia
  • Note: With most ArcGIS functions and tools, several methods can accomplish the same task.

Draw and paint—ArcGIS GeoPlanner Documentation for

  • Click the Drawing Tools icon to display the drawing tools toolbar
  • Optionally, click the dropdown next to the tool and choose a design layer
  • Sketch a line through the polygon (or polyline) that you want to split
  • Double–click to stop sketching and execute the split.

Polygon to point using the basic ArcGIS license – Behind

  • Here is one example of converting polygon centroids to points (the Polygon to Point tool requires the advanced license)
  • Open the table of the Polygon layer and add 2 new fields called ‘x’ and ‘y’
  • Make sure the type is ‘double’ or at least ‘long integer’
  • Still in the table view right click on the field name ‘x’ and select

Edit features to create enumeration areas Learn ArcGIS

  • Create a feature layer for geolocation points, add new points to a map, and fix errors in existing points
  • Create enumeration areas based on a series of guidelines and modify existing areas to remove gaps and other errors

In ArcGIS, how do I create a shapefile from GPS

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  • In ArcGIS, you can use data collected from a GPS device to create a shapefile containing points, lines, or polygon features
  • For more about shapefiles, see Shapefile in Wikipedia
  • Note: With most ArcGIS functions and tools, several methods can accomplish the same task.

Create Points from CSV using ArcGIS

  • Creating a set of points in shapefile format using ESRI's ArcGIS software is as simple as running two tools from ArcToolbox
  • • Spaces, dashes, and periods are not allowed for field names in the header row.

ArcGIS 10: Editing & Creating Your Own Shapefiles

4) You will see a new window on the screen called “Create New Shapefile” 5) Give your new shapefile a “Name” (like “Refuge) 6) Under the “Feature Type” dropdown, choose “Polygon.” 7) Note: if you wanted your new layer to be a points layer, you should choose “Points” etc.

Create a new shapefile in ArcGIS Pro – GIS Crack

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  • By default ArcGIS Pro points out that the new vector file will be created within a Geodatabase
  • But as a new shapefile is required, just replace the geodatabase with the name of a folder, and add the *.SHP format to the name of the vector file
  • In this sense, it is recommended to make the following configuration in the Create Feature Class tool:

Creating a new shapefile and digitizing basics in ArcMap

  • Make sure the new shapefile is listed as the Target, and Create New Feature is listed as the Task
  • Click the Editor button, and choose Start Editing
  • This activates the bar, and the Pencil tool may be used to edit new features
  • For a polygon, single-click each node and double-click to close the polygon

Draw and paint—Portal for ArcGIS ArcGIS Enterprise

  • Draw Polygon is used to create polygons following mouse clicks
  • Draw Auto-Completed Polygon is used to create polygons that adjoin each other
  • This tool creates a polygon that appends to the boundary of an existing polygon following mouse clicks
  • Draw Circle is used to create round features
  • Draw Ellipse is used to create ellipse features.

Geoprocessing service example: Drive-time polygons—ArcGIS

Complexity: Intermediate Data Requirement: ArcGIS Tutorial Data for Desktop Data Path: C:arcgisArcTutorGP Service ExamplesNetwork AnalystDriveTimePolygons Goal: Author, publish, and use a geoprocessing service that creates polygons based on drive times around points.

GeoMessage tool—ArcGIS Mission Documentation for ArcGIS

A geomessage in ArcGIS Mission can be one of three types: Point of interest — A map pin used to indicate a single point on a map Line — A map graphic often used to indicate boundaries, roads, or other linear features Polygon — A map graphic used to denote contiguous areas of various types Create a geomessage


Web Editing Tutorial. Copyright Esri All rights reserved.

3 Tutorial: Creating a Web editing application With ArcGIS Server, you can create Web applications for editing data without writing any code. You create these applications in ArcGIS Server Manager. This example shows how to create a Web editing application in Manager. Creating the application is actually the final step of a larger workflow. The first step is to make your data available through an ArcSDE geodatabase. This example uses a database server (ArcSDE for SQL Server Express) because it works with the free Microsoft SQL Server Express database and is available with the Workgroup level of ArcGIS Server. Once you have your data available through ArcSDE, you need to create a map from the data and symbolize it appropriately. You'll publish this map document to ArcGIS Server so that it will be available to users of your Web application. As a final step, you'll create and configure the Web application with the Editing task. This document explains each part of the workflow. Making the data available through ArcSDE Complexity: Intermediate Data Requirement: Use your own data Goal: Use ArcGIS Server Manager to create an application that can perform editing over the Web. There's no specific data that you need for this tutorial. It's recommended that you use a subset of your own data that includes some point, line, and polygon layers. By using your own data for this test application, you'll be well prepared to create your production application. Copyright Esri. All rights reserved. 3

4 Installing ArcSDE Creating a Web editing application in Manager requires that your data be available in an ArcSDE geodatabase. That's because ArcSDE geodatabases are designed to be edited simultaneously by multiple users, which is the situation you'll encounter through a Web application. If your data is in ArcSDE already, you can skip the rest of this section. If your data is in some other format, you need to move it to ArcSDE. An easy way to set up a small deployment is to use the ArcSDE included with ArcGIS Server Workgroup, which uses the Microsoft SQL Server Express database. The first thing you need to do, if you haven't already, is install ArcSDE for SQL Server Express. The ArcSDE CD or DVD comes with ArcGIS Server and contains an Install Guide that can help you through the installation and postinstallation. Note: If you want to work through this tutorial and you have ArcGIS Server Enterprise, chances are your data is in ArcSDE already. If not, you need to install ArcSDE Enterprise and move your data into it before continuing with this tutorial. The steps below are for the Workgroup level of ArcGIS Server and will not work with ArcGIS Server Enterprise. You can find information about administering Enterprise geodatabases in the ArcGIS Desktop Help book Administering geodatabases licensed through ArcGIS Server Enterprise. Creating the geodatabase Once you've installed ArcSDE for SQL Server Express, follow these steps to create a geodatabase: Steps: 1. Start ArcCatalog and find the Database Servers node. A database server is a machine containing a SQL Server Express database and ArcSDE for SQL Server Express. This is where you'll add and manage your geodatabase. 2. Double-click Add Database Server and enter the SQL Server Express instance to which you want to connect. In most cases, this will take the form of <database server name>sqlexpress. You'll see the server appear in the list. Tip: If you have any difficulties connecting to the database server, see Troubleshooting database servers. 3. The ArcGIS Server Object Container (SOC) account needs permission to read data from the database server. Right-click the database server you just added and click Permissions. 4. Click Add User and add the SOC account. 5. Now you can add a new geodatabase. In the list of Database Servers, right-click your server and click New Geodatabase. 6. Type a Name for your geodatabase, then set a Location and Initial Size. Don't worry about setting the initial size too low the geodatabase will grow as it needs to until it reaches SQL Server Express's 4 GB limit. 7. You've already given the SOC account permissions to use the database server, but now you need to define the permissions the SOC account will have for this specific geodatabase. Right-click your new geodatabase and click Administration > Permissions. 8. Click the SOC account, give it Read/Write permissions, then click OK. Tip: If you don't see the SOC account in the list, make sure you completed steps 3 and 4. Copyright Esri. All rights reserved. 4

5 9. Use ArcCatalog to copy and paste any existing feature classes that you want to add to your new geodatabase. A note about attribute domains and subtypes To enhance the user experience of the Editor task and to prevent data entry errors, configure your datasets to use subtypes and attribute domains where appropriate. These provide ways of categorizing your data and ensuring that appropriate values are entered when the data is edited. In some cases, the Editor task can detect and use the subtypes and domains. For example, if you have a domain limiting the color of a fire hydrant to red, yellow, or blue, you will see a drop-down list in the Editor task allowing only the selection of one of those three colors. The picture below shows part of an Editor task in which a roads feature class has been configured to use a domain. The user can now classify the road using a drop-down list. Remember, if you want these drop-down lists to be available in the Editor task, you'll need to prepare your geodatabase by creating domains and subtypes. This might happen long before you publish the service or create the Web application. Authoring the map The map you use in your Web editing application can contain both editable and noneditable layers. Follow these steps to create the map: Steps: 1. Start ArcMap and open a new empty map. 2. Add all the layers you want to see in the map. You should include at least one layer from an ArcSDE geodatabase. Only layers from ArcSDE geodatabases will be editable through the Editor task. 3. Set up the symbology and layer order that you need. Tip: If you set a layer's symbology based on unique values, the different symbols will appear in the Editor task as individual buttons. This can help a user quickly pick the type of feature he or she would like to create. For example, the image below shows what the Editor task looks like when the Buildings layer of the map has a unique value renderer applied. The renderer was based on a building type field. The task exposes buttons for creating each type of building. Clicking the green button allows the user to create a residential building. Copyright Esri. All rights reserved. 5

6 4. Save the map document. Publishing the map service Once your map document is complete, you can publish it as a map service. When you publish a map service, you make it available on your ArcGIS Server so that many users can access it at once. Choosing pooled or nonpooled You can choose to make a service available in either pooled or nonpooled modes. When you use a pooled service, you share instances of the service with many other users while you work through your edit session. In contrast, when you use a nonpooled service, an instance of the service is dedicated to you throughout your entire edit session. With nonpooled services, if someone else needs to use the service at the same time as you, another instance of the service must be created at the expense of server resources. You can use both pooled and nonpooled services for editing over the Web. When you edit with pooled services, each edit is saved immediately. This means that the data cannot be versioned and you cannot undo your edits. However, using pooled services, you can accommodate many more concurrent editors than you can with nonpooled services. Copyright Esri. All rights reserved. 6

7 Setting the required permissions Before publishing your services, be sure to read and follow the guidelines presented in Preparing resources for publishing as services. These will help you ensure that the server has permissions to read and access all the data for your map. Specifically, the SOC account needs to have read permissions to your map document and any data in the map document. It also needs to have write permissions to any data that you will be editing. Publishing the service Follow these steps to publish a map service that you can use for editing: Steps: 1. Log in to ArcGIS Server Manager and click Publish a map, globe, or other GIS resource as a service. Tip: There are two wizards in Manager that you can use to publish services. This link takes you to the Publish GIS Resource wizard, which is the simplest way to create a service. It asks you the minimum amount of information needed to create a service. The other way to create services is through the Add New Service wizard. This wizard is the completely manual way of publishing a service it prompts you for all the service parameters. 2. On the first page of the wizard, you're prompted for the resource that you want to publish. This is the map document you just created. If it's in a shared directory, you can browse to the map document. If it's not in a shared location, carefully type the path of the map document. 3. Give your service a Name. Optionally, if you have your services grouped in folders, choose the folder where you want to publish the service. Click Next to move to the second page of the wizard. 4. Notice that the Mapping capability is enabled by default. The other available capabilities will vary depending on what types of layers are in your map. For this example, you can accept the default and click Next. 5. The final page of the wizard explains that the service will be created and gives its URL. Click Finish to publish the service and close the wizard. Important: This wizard creates a pooled service by default. If you need to do versioned editing or you require the undo/redo capability, you need to change this to nonpooled. In Manager, click the Services tab, find your service, then click the Edit (pencil) icon. Click the Pooling tab and change the service to be Not Pooled. Click Save. Copyright Esri. All rights reserved. 7

8 Creating the Web application Once you have a running map service, you can create the Web editing application. You'll do this using the Manager wizard interface for creating a Web mapping application. Some of the most important things you'll do in this wizard are selecting the map for the application to display (telling it to use a local connection) and configuring the Editor task. These are the steps for creating the Web application: Steps: 1. Click the Applications tab in Manager and click Create Web Application. A wizard appears that helps you create the application. 2. Type a Name for your application. This name will appear in the application's URL. Optionally, type a description for use within Manager and click Next. 3. The next page helps you choose the services you want to display in your map. You need to add the map service you just published that contains your editable layers, so click Add Layer. 4. Examine the list of servers in the Available Services dialog box. Does your server name appear, followed by the words ArcGIS Server Local? If not, you need to click Add GIS Server, choose to add an ArcGIS Server Local connection, then type the name of your server and click Add. Copyright Esri. All rights reserved. 8

9 Remember: An ArcGIS Server local connection is required for editing. Your Web application will still be available through the Internet, but the application itself needs to make a local connection to the GIS server for the editing to occur. 5. Once you've successfully added your server, you'll see a list of available services that you can add to your map. Click the map service that you just published and click Add. 6. Once you see a message that the layer has been added successfully, click Close to close the dialog box and click Next to move to the next page of the wizard. 7. On this panel, you can choose the tasks you want in your application. You want to include the Editor task, so click Add Task. In the Available Task Items list, click Editor and click OK. 8. With the Editor task still selected, click Configure. You can use the resulting dialog box, the task configurator, to do the following things: Choose the layers and versions you can edit You may not want to expose all the layers in your map for editing. Similarly, you may want your users to only edit specific versions. On the General tab, you can check and uncheck the editable layers and versions. Choose the types of edits users can make On the Settings tab of the configurator, you can choose whether or not users will be able to add features, edit attributes, or edit features. For example, you may want users to be able to add new features, with the assurance that they will not modify any existing features in the database. Set the selection rules To edit a feature, you first need to select it. The configurator gives several options for how users make selections and how many features they can select at once. You can set these options here, or you can choose if these options are exposed through the task so that each user can set it up in his or her preferred way. Set the snapping rules When editing a feature, you may want to share boundaries or vertices with existing features. Snapping is a way to ensure that if you place a feature close enough to an existing vertex or boundary, your feature will share that vertex or boundary. Snapping is important for maintaining data quality it can help you avoid topological problems like overshoots and sliver polygons. Copyright Esri. All rights reserved. 9

10 On the Settings tab of the configurator, you can set snapping rules, such as which features can be snapped to and how close you need to click for snapping to occur (this distance is known as the snapping tolerance). Set conflict resolution rules What happens when two people edit the same features, then save their edits? On the Advanced tab of the configurator, you can set rules for the way the database will handle these situations. See the topic Editor task for a discussion of different conflict resolution options. If you're editing a pooled service, you won't be able to set any of the conflict resolution options this is because in the nonversioned editing environment, the edits are saved immediately. If two people edit the same feature, the last edit to be made is the one that will remain in the database. Tip: If you see a message that your map does not contain editable layers, check to make sure that you gave the SOC account Read/Write permissions to the geodatabase, as described previously in this document. Your map must contain at least one layer from a geodatabase before you can edit. 9. When you've configured the Editor task the way you want it, click OK to close the dialog box and click Next to move to the next page of the wizard. Read the information about local connections and, if necessary, change the account that will be used to make the local connection. 10. You've completed the essential parts of configuring the Editor task, so you can click Next to advance through the remaining pages of the wizard. These give you the opportunity to customize the look of your application. When you're ready to create the application, click Finish. Using the Web editing application As you view your new Web application, you'll see a list of tasks across the top of the map. You can open the Editor task from this task bar. The Editor task runs inside its own floating panel, which you can move around the screen. The application has built-in help that you can access by clicking the Help link in the upper right corner. The help has an Editing data section that explains each tool on the Editor task dialog box. This help was created in HTML so that you can customize it if needed. Copyright Esri. All rights reserved. 10

11 Editing in a Web application has a slightly different feel from editing in ArcMap. When using the Editor task, you'll often need to point and click in situations where you may be accustomed to clicking and dragging in ArcMap. Also, when snapping, the pointer does not automatically jump to the snap point on the screen, but the snapping will occur if you place the point within the snapping threshold. It may be helpful to prepare a practice application that your editors can use to familiarize themselves with the Web editing environment. This is especially recommended if your editors will be working with nonversioned data, where undo/redo is not available. Copyright Esri. All rights reserved. 11


Creating SCS Curve Number Grid using HEC-GeoHMS

1 Creating SCS Curve Number Grid using HEC-GeoHMS Prepared by Venkatesh Merwade School of Civil Engineering, Purdue University September 2012 Introduction SCS curve number grid is used by many hydrologic models to extract the curve number for watersheds. The objective of this tutorial is to use soil and land use data to create a curve number grid using HEC-GeoHMS (ArcGIS 10 version). Computer Requirements You must have a computer with latest windows operating system, and the following programs installed: 1. ArcGIS 10 (ArcView) 2. Hec-GeoHMS for ArcGIS 10 You can download the HEC-GeoHMS version from the following link: You will need to have administrative access to install Arc Hydro and HEC-GeoHMS. Data Requirements and Description This tutorial requires the following datasets: (1) DEM for the study area (2) SSURGO soil data (3) 2006 land cover grid from USGS The DEM and land cover grid from USGS and SSURGO data for Cedar Creek in northeast Indiana are provided as zip file at the end of this paragraph. The SSURGO soil data that will be used is provided in a geodatabase (cedar_ssurgo.mdb) that is created in the Downloading SSURGO Soil Data tutorial available at: ( You can look at the SSURGO download tutorial if you want to learn how this dataset is processed. Also, if you are interested in downloading the DEM and land cover data by yourself, instructions are available in the following tutorial: It is highly recommended that you go through these exercises of downloading the data to make yourself aware of the procedure involved. 101

2 (Notes: 1. The DEM, land use and soil data used in this tutorial are already clipped to the Cedar Creek study watershed 2. This tutorial uses the SSURGO soil data, which is the highest resolution soil data available in public domain from NRCS. This can be replaced by STATSGO data as long as you know how to interpret STATSTO to follow the steps provided in this tutorial) Download the data from ftp://ftp.ecn.purdue.edu/vmerwade/download/data/cngrid.zip Unzip cngrid.zip in your working directory. The ArcCatalog-view of the data folder (or whatever name you gave to your working folder) is shown below: cedar_ssurgo is the geodatabase with SSURGO spatial and tabular data for cedar creek area. cedar_dem is the raw 30 DEM for Cedar Creek obtained from USGS and clipped for the study watershed, and cedar_lu is the 2001 land cover grid from USGS. All datasets have a common spatial reference (NAD_1983_UTM_16). Note: It is very critical to assign and use consistent coordinate system for all the datasets. Getting Started Open ArcMap. Create a new empty map, and save it as cngrid.mxd (or any other name). Add Spatial Analyst extension and activate it by clicking on Customize Extensions, and checking the box next to Spatial Analyst. Preparing land use data for CN Grid Add cedar_luse grid to the map document. You will see the grid is added with a unique symbology assigned to cells having identical numbers as shown below: 102

3 These numbers represent a land use class defined according to the USGS land cover institute (LCI). A description of some of the land classes and their associated numbers in the grid is shown below by reproducing LCI webpage ( You can visit LCI website (publications link) to learn more about how the land use grid is created. 103

4 Eventually, we are going to use these land use classes and soil group type, in conjunction with SCS curve numbers, to create the curve number grid. The SCS CN table gives CN for different combinations of land use and soil group. The cedar_lu grid has 15 different categories which you can leave unchanged, or reclassify the grid to reduce the number of land use classes to make the task easier. If you open the attribute table of cedar_lu, you will see that majority of cells represent grass/crops, followed by forest, developed land, and then water. We will reclassify cedar_lu to represent these four major classes. The following table shows how we will accomplish the reclassification of cedar_lu (you are free to have more or less classes). Original NLCD classification Revised classification (reclassification) Number Description Number Description 11 Open water 1 Water 90 Woody wetlands 95 Emergent herbaceous wetlands 21 Developed, open space 2 Medium Residential 22 Developed, low intensity 23 Developed, medium intensity 24 Developed, high intensity 41 Deciduous forest 3 Forest 42 Evergreen forest 43 Mixed forest 31 Barren land 4 Agricultural 52 Shrub/scub 71 Grassland/herbaceous 81 Pasture/hay 82 Cultivated crops To implement the above re-classification, use the Spatial Analyst Tools in Arc Toolbox. Click on Spatial Analyst Tools Reclass Reclassify, and then double-click on Reclassify tool. In the reclassification window, confirm the Input raster is cedar_lu, Reclass field is Value, and then manually assign the new numbers based on the above table as shown below (leave NoData unchanged). 104

5 Save the output raster as lu_reclass in your working folder, and click OK. A new grid named lu_reclass will be added to the map as shown below (you may not get the same colors in symbology which is OK) The final step in processing land use data is converting the reclassified land use grid into a polygon feature class which will be merged with soil data later. In ArcToolbox, Click on Conversion Tools From Raster Raster to Polygon. Confirm the Input raster is lu_reclass, the Field is Value, output geometry type is Polygon, and save the Output features as landuse_poly.shp in your working directory (this output is saved only as a shapefile without any other options). Click OK. 105

6 You can symbolize the new landuse_poly.shp to match with lu_reclass grid or leave it unchanged. Also, you can export landuse_poly.shp to cedar_ssurgo.mdb to keep all the data in a single geodatabase. Save the map document. The processing of land use data for preparing curve number grid is over. Now let us prepare soil data. Preparing Soil data for CN Grid Add cedar_soil_clip feature class from spatial feature dataset within cedar_ssurgo.mdb. For extracting CN numbers, we need soil group for each polygon in cedar_soil_clip feature class. If you open the attribute table for cedar_soil_clip, you will notice that there is no field for storing soil group (you can refer to SSURGO tutorial to understand the meaning of each field in cedar_soil_clip). So the first step is creating an empty field for storing soil group data. Create a field named SoilCode (type: Text) in cedar_soil_clip. The soil group data are available in the component table (in hydgrp field) so add the component table from cedar_ssurgo.mdb to the map document. The polygon features in cedar_soil_clip are related to component table through mukey field. Right click on cedar_soil_clip in the ArcMap table of contents, and click on Join and Relates Join. Join component table to cedar_soil_clip by using the common mukey field as shown below: 106

7 Click OK. You may get a message asking you to index fields. You can respond to this message by selecting either yes or no - it does not matter in this exercise because we will join the table only once. After you create the join, open the attribute table for cedar_soil_clip, and you will see that the fields from component table are now available in cedar_soil_clip feature class. Now populate the SoilCode (or cedar_soil_clip.soilcode) field in cedar_soil_clip by equating it with component.hydgrp field. With the attribute table open, right click on SoilCode field to open the field calculator and then equate SoilCode to component.hydgrp as shown below: 107

8 Click OK. If there are rows in component with Null values (which is the case for this dataset), you may get an error message saying the values are too large for the field. Just ignore this message and continue. After the calculations are complete, you should see cedar_soil_clip.soilcode populated with letters A/B/C/D. Now remove the join and save the map document. Before we proceed, let us deal with <Null> rows for SoilCode field. Review the SoilCode field, and you will see that most polygons have C soil group so let us assign a SoilCode of C for all polygons that do not have soil group associated with them (this is just one way of dealing with the issue for small number of Null rows. If the number of Null rows is significantly high, you may want to consult other resources before assigning SoilCode to these rows). Select the rows in cedar_soil_clip that have <Null> values for SoilCode and assign them a value of C. You can use select by attributes option to do this. Now you should have a SoilCode (soil group) assigned to each polygon in cedar_soil_clip. 108

9 Next create four more fields named PctA, PctB, PctC, and PctD all of type short integer in cedar_soil_clip feature class. For each feature (polygon) in cedar_soil_clip PctA will define what percentage of area within the polygon has soil group A, PctB will define what percentage of area within the polygon will have soil group B and so on. This is critical when we have polygons with more than one soil group (for eg. A-B-A/D would mean that group A, group B and group A/D soils are found in one polygon A/D would mean the soil behaves as A when drained and as D when not drained, and so on). If we have classifications such as these, we need to define how much area of a polygon is A/B/C/D. For Cedar Creek area we have only one soil group assigned to each polygon so a polygon with soil group A will have PctA = 100, PctB = 0, PctC = 0, and PctD = 0. Similarly for a polygon with soil group D, only PctD = 100, and other three Pcts are 0. Now populate PctA, PctB, PctC and PctD based on SoilCode for each polygon. You can select features based on SoilCode and then use field calculator to assign numbers to polygons. The resulting attribute table should look like below: The preparation of soil data is over at this point. The next step is to merge/union both soil data and land use data to create polygons that have both soil and land use information. Save the map document. Merging of Soil and Landuse Data To merge/union soil and landuse data, use the Union tool in ArcToolbox available under Analysis Tools Overlay. Browse/drag cedar_soil_clip and landuse_poly as input features, name the output feature class as cedar_soil_lu in the same geodatabase (cedar_ssurgo.mdb), leave the default options, and click OK (you can change the cluster tolerance to a small number, but this is not necessary). 109

10 This process will take few minutes, and the resulting cedar_soil_lu feature class will be added to the map document. Save the map document. The result of union/merge features inherit attributes from both feature classes that are used as input. However, if the outer boundaries of input feature classes do not match exactly, the resulting merged feature class (cedar_soil_lu in this case) usually will have features that will have attributes from only one feature class because the other feature do not exist in this area. These features are usually referred to as slivers. If you open the attribute table for cedar_soil_lu, you will find that there are several sliver polygons in this feature class that have attributes only from landuse_poly and the soil attributes are empty, and vice versa as shown below: In the above table the columns that start with FID_. give the object ids of features from landuse_poly and cedar_soil_clip. A value of -1 for FID_. means one of the feature classes do have features in that area to union with features from other feature classes. Basically a value of - 1 for FID_. means that feature is a sliver polygon. You can also verify this by looking at other 110

11 fields. For example features that have FID_cedar_soil_clip = -1 have attributes only from landuse_poly and all attributes from cedar_soil_clip = 0. One way to deal with sliver polygons is to assign missing values to all features. Another way (easiest!) is to just delete them. For this exercise we will take the easy route, but you may want to populate these features for other studies depending on your project needs. Start the Editor. Select all the features that have FID_. = -1 and delete them. Save your edits, stop the Editor, and save the map document. This finishes the processing of spatial data for creating the curve number grid. The next step is to prepare a look-up table that will have curve numbers for different combinations of land uses and soil groups. In this case, we will use SCS curve numbers that are available from literature (SCS reports, or SCS tables from text books). The spatial features in conjunction with the look-up table can then be used to create curve number grid. Creating CN Look-up table Create a table named CNLookUp inside cedar_ssurgo.mdb. In ArcCatalog, select Data Management Tools Table Create Table. Once the table is created create the following fields in it: 1. LUValue (type: short integer) 2. Description (type: text) 3. A (type: short integer) 4. B (type: short integer) 5. C (type: short integer) 6. D (type: short integer) Now start the Editor to edit the newly created CNLookUp table, and populate it as shown below. 111

12 Columns A/B/C/D store curve numbers for corresponding soil groups for each land use category (LUValue). These numbers are obtained from SCS TR55 (1986). Save the edits and stop the Editor. Save the map document. Creating CN Grid We will use HEC-GeoHMS to create the curve number grid. Activate the HEC-GeoHMS Project View toolbar in the same way as ArcHydro toolbar. HEC-GeoHMS uses the merged feature class (cedar_soil_lu) and the lookup table (CNLookUp) to create the curve number grid. The format and the field names that we are used in creating the CNLookUp table are consistent with HEC-GeoHMS. Before we proceed, one final step is to create a field in the merged feature class (cedar_soil_lu) named LandUse that will have land use category information to link it to CNLookUp table. We already have this information stored in GRIDCODE field, but HEC- GeoHMS looks for this information in LandUse field. So create a field named LandUse (type: short integer), and populate it by equating it to GRIDCODE. On the HEC-GeoHMS Project View toolbar, click on Utility Create Parameter Grids.. Choose the lookup parameter as Curve Number (which is default) in the next window, Click OK, and then select the inputs for the next window as shown below: HydroDEM for Hydro DEM, cedar_soil_lu (merged soil and land use) for Curve Number Polygon, CNLookUp table for Curve Number Lookup, and leave the default CNGrid name for the Curve Number Grid. 112

13 This process takes a while (actually quite a while!). Be patient and CNGrid will be added to your map document. You can change the symbology of the grid to make it look pretty! You now have a very useful dataset for use in several hydrologic models and studies. Save the map document, and exit ArcMap. OK. You are done! 113


Topology Editing using ArcView (now called Basic) license level of ArcGIS Desktop? - Geographic Information Systems

Posted by Gail the Actuary on May 11, 2010 - 10:33am

Congressional hearings will begin today regarding the cause of the Deepwater Horizon blowout. Newspaper reports available this evening indicate one set of testimony may be with respect to nitrogen cement, which is "puffier and lighter" than regular cement.

Halliburton, the contractor for the cementing job on the Deepwater Horizon well that blew on April 20, used a type of nitrogen-charged cement to close off the bottom of the well, 13,000 feet below the sea bed. The nitrogen gas was blended into regular cement to make a substance that was puffier and lighter than the cement generally used in oil drilling.

Experts said this type of cement can form a stronger bond in certain types of rock, but is also more difficult to use than standard cement, requiring great care in mixing and application.

A supervisor on the rig has said he had not seen nitrogen cement used before in the deepest part of a well, and investigators are examining whether it contributed to the catastrophic explosion that killed 11 workers and caused a continuing oil leak estimated to exceed 200,000 gallons a day.

Testimony is also expected by Halliburton, asserting that cement plugs were not placed at the right time. The Wall Street Journal reports:

Tim Probert, Halliburton's president of global business lines, plans to testify Tuesday that his company had finished an earlier step, cementing the casing, filling in the area between the pipe and the walls of the well pressure tests showed the casing had been properly constructed, he will testify.

At this point it is common practice to pour wet cement down into the pipe. The wet cement, which is heavier than the drilling mud, sinks down through the drilling mud and then hardens into a plug thousands of feet down in the well.

The mud then is removed and displaced by seawater the hardened cement plug holds back any underground gas.

In this case, a decision was made, shortly before the explosion, to perform the remaining tasks in reverse order, according to the expected Senate testimony of Mr. Probert, the Halliburton executive.

"We understand that the drilling contractor then proceeded to displace the riser with seawater prior to the planned placement of the final cement plug…," Mr. Probert says in the prepared testimony, which was reviewed by The Wall Street Journal. The "riser" is part of the pipe running from the sea floor up to the drilling rig at the surface.

"One gas kick that occurred as they got toward the bottom of the hole, approximately 10,000 feet below the sea floor, was such a large gas kick that they had to shut down operations," Bea said. "They were concerned about spark sources (on the rig at the surface) so they had to shut it down, because there was so much gas coming out of the rig and they were afraid of the explosion."

Deposits of oil are not in underground caverns they ooze in the pores of a sponge-like layer of rock, along with natural gas in both gaseous and the crystallized hydrate forms. But the hydrates also exist throughout the drilled rock formations, and like the oil below, they exert upward pressure when a drilling operation opens a path to the surface.

In the incident that forced Deepwater Horizon to shut down drilling temporarily, workers in the rig's drilling mudroom stabilized the situation by putting a heavier form of "mud," actually a mixture of clay and chemicals, into the drill-pipe as a counter-balance, pushing down against the upward pressure of the gas, Bea said.

'Uh oh'
A transcript Bea collected from a witness says the companies were confident enough they had a lucrative oil source that they decided to convert from an exploratory well to a more permanent production well, a process that requires them to apply a metal and cement casing to the well hole. They chose casing 7 inches in diameter, Bea said, and that was further sealed with cement pumped in by Halliburton. Bea said his sources reported that Halliburton was using a "new" kind of cement for the seal, something the scientist said made him say, "Uh oh."

"The cement is infused with chemicals and nitrogen, and those chemicals and nitrogen form a frothy cement that is like shaving soap sprayed from a can," Bea said. "It was put in there because of the concern about damage or destruction of the seals by methane hydrates."

The crew on the Deepwater Horizon waited 20 hours for the cement job to cure before opening a key valve at the wellhead so they could place a final cement plug about 5,000 feet down the well. Bea gives Halliburton credit for writing "many excellent papers" in the past two years about the challenge of setting cement seals in the presence of large amounts of methane hydrates, which the Deepwater Horizon crew encountered in spades.

"Because of the chemicals they've added, they think the cement can cure rapidly," Bea said.

But Halliburton's awareness of cementing's challenges did not stop the cement from failing in the Deepwater Horizon's well. The chemicals they added for the curing process also create a lot of heat, which can thaw the methane hydrate into the gas that causes dangerous kicks, Bea said.

"I call that 'Uh oh' again," he said.

There will no doubt be other finger pointing as well. Commenters are asked to add additional stories, as well as their views on the reasonableness of these assertions.


Kinds of polygons pdf file

The minute hand of a clock moves a quarter turn from 3 to 6. Videos, worksheets, stories and songs to teach grade 3 students the types of polygons. New polygons are created by the intersection of the input polygon boundaries. Polygons can be combined to make different polygons. Unit 4 grade 8 lines, angles, triangles, and quadrilaterals. Polygons are used to represent areas such as the boundary of a city on a large scale map, lake, or forest. If the shape had curves or didnt fully connect, then it cant be. Files in ctg format will have a resolution of 30 meters. This technique is referred to as primitiveup modeling. Otherwise, it is convex no points of the lines are in the interior. The main file is a direct access, variablerecordlength file in which each record describes a shape with a list of its vertices. An pentadecagon is a 15 sided polygon with interior angles that add to 2340 degrees.

You can add most item types through content my content add item. Mathematics revision guides properties of triangles, quadrilaterals and polygons page 3 of 25 author. If a polygon is not regular, it is called irregular. There are quite a few members of the quadrilateral family.

Lets look at qgis to see what types of vector data i can use. The bulk of your work will be done using this type of data. This page has printable geometry pdfs on angle types. Students create as many different types of quadrilaterals as they can with tangrams. The distance around a plane figure can be measured.

Produce pdf files, draw polygons with rounded corners. Strategic intervention material in math 5 free download as powerpoint presentation. A convex polygon is the opposite of a concave polygon. A regular polygon has all angles equal and all sides equal, otherwise it is irregular. Polygons plane shapes having three or more straight sides. A polygon is said to be regular when all its sides and angles are equal. Review the types of polygons by displaying a triangle, quadrilateral, pentagon, and. Unit 4 lines, angles, triangles, and quadrilaterals 5 4. Exercise 6b example 1 state whether these angles are acute, right angle, obtuse or reflex.

Gis geographic information systems, geospatial data. Students should realize they are surrounded by many different kinds of shapes every day. You can edit shapefiles in arcgis for desktop with any license level arcgis for desktop basic, arcgis for desktop standard, or arcgis for desktop advanced. Mar 14, 2012 the problem is that i need to script tye pdf creation process and i want the polygon shapes to be retained. Calculate the sizes of the unknown angles in the following triangles. Polygons have the same number of sides as vertices. Polygons of many types, continued day session common core adaptation common core standards 10 2.

The names for polygons with a given number of sides. Simple and complex polygons a simple polygon has only one boundary and the sides do not cross each other, otherwise it is a complex polygon. For each shape that you make, mark a point in the four end holes of the strips. Thus, a regular polygon is both equilateral and equiangular. Polygon overlay is similar to the pointinpolygon operation in the sense that two sets of objects are involved exists in two form depending whether discrete or continuous perspective is taken. There are many types in the regular polygons such as quadrilateral, pentagon, hexagon, heptagon, octagon, nonagon, decagon etc. An interactive math lesson about types of polygons based on number of sides. Angle that measures 90 degrees which angle is a right angle. Images taken with a digital camera produce these same types of files. Unit 7 polygons and circles diagonals of a polygon. Types of polygons if the lines of any segment of the polygon are drawn and any of the lines contain points that lie in the interior of the polygon, then it is concave.

A regular polygon has all sides and all angles equal. Polygon modeling overview maya 2016 autodesk knowledge. More precisely, no internal angle can be more than 180. Strategic intervention material in math 5 polygon physics. As you work th rough the lessons in this book, you should feel as if someone is guiding you through each one. Vector data is a format whereby points, lines, and polygons are used to represent real features on the earths surface such as an address location, a street or a zip code area. The more advanced worksheets include straight and reflex angles too. Twodimensional 2d shapes are plane or flat shapes, having only the two. The pattern is made from two types of tiles, tile a and tile b. Investigating relationships of area and perimeter in similar. Types of polygons according to their sides and vertices it also includes handy facts to know about polygons such as the formulas to calculate both the exterior and the interior angles. Triangles, quadrilaterals, pentagon, hexagon, heptagon, octagon, nonagon, decagon. When most people hear the word geometry, they think about shapes.

Files in giras format will have a minimum polygon area of 10 acres 4 hectares with a minimum width of 660 feet 200 meters for manmade features. The width of the george washington bridge is 119 ft. What this means is a point, polygon, line geometry existing in the same shape file. These printable task cards will challenge students to identify acute, right, and obtuse angles.

Many of these shapes are twodimensional plane figures. In this card game, players match up the polygon or solid shapes with their names. While dimension may import a file format, it may not support all types of content in that file. The file print print to pdf creates a 1 mb file and retains the shape of the polygons. Vector files can contain sets of points, lines, or polygons that are referenced in a geographic space. His document is a research work that calls for the. They are made of straight lines, and the shape is closed all the lines connect up. Polygon definition is a closed plane figure bounded by straight lines.

As class nears the end, i hand out the paper entitled names of polygons and i allow the students to look at and discuss the names. Types of parallelogram properties, shapes, sides, diagonals. Based on explorations and using concrete models, the student formulates and tests conjectures about the properties and attributes of polygons and their component parts. A polygon is any shape made up of straight lines that can be drawn on a flat surface, like a piece of paper. This could be understood through the table given below.

Triangles can be classified in various ways, based either on their symmetry or their angle properties. A polygon is a many sided closed figure comprised completely of line segments. A plane figure bounded by a number of straight lines is called polygon. Each mentioned endpoint is called a vertex and each mentioned segment is called a side of the polygon. A regular polygon is one that is both equilateral and equiangular. At the end of the lesson, the learners should be able to. An interior angle or internal angle is an angle formed by two sides of a simple polygon that share an endpoint interior. Polygons can be divided to make different polygons.

The resulting polygons have all the attributes of the original polygons. Since esri released the shape file to open source multigeometry has been added by the programming open source community. Vector data, meaning data such as points, lines, and polygons, are extremely important in qgis. As for drawing polygons with rounded corners, im not aware of any graphics library which supports this out of the box. Angles, triangles and polygons use a single letter. A copy of the license is included in the section entitled gnu free documentation license. Now we are going to see about the kinds of polygons in. Scribd is the worlds largest social reading and publishing site. All the sides are congruent in an equilateral polygon. Notice how all the shapes are drawn with only straight lines.

This pdf is competently known sticker album in the world, of course many people will attempt to own it. This is in order to relate the plane shapes with relevant engineering equations that deal. Give the number of sides and angles of a given polygon accuratelyii. The sum of the three angles of a triangle equals 180. Joining a square and two triangles makes a trapezoid.

However, to take advantage of advanced editing functionality, such as topology, you will need to import the shapefile into a geodatabase as a feature class. The polyline is a series of open, connected straight lines. Chapter 4 triangles, quadrilaterals, and other polygons use the table for questions 14. Most 3d model formats can hold many types of media including 3d models, cameras, lights, images, and even video.

Perimeter, area and volume of regular shapes perimeter of regular polygons perimeter means the total length of all sides, or distance around the edge of a polygon. I remind everyone of the due date of the task and show them where in the classroom they can find the good graph paper to use for the final version of their project. Challenge make a new shape by combining at least 3 different polygons. Individual polygons can be created using the create polygon tool or the quad draw tool.

Non polygons like nurbs and curves cant be imported. Take a close look around you in your house, at the work place, or in an amusement park, you will find many real life examples of polygons. Parallel lines and polygons worksheet free pdf file sharing. Overlay analysis is often used in conjunction with other types of analysis. Shapes have symmetrical properties and some can tessellate. Pdf the new formulae for application of polygons in engineering. Many 3d modelers begin with polygon primitives as a starting point for their models. How to save pdf to dxf file verypdf knowledge base. Quickly access your most used files and your custom generated worksheets. By joining mid points of sides of rectangle a rhombus is formed and viceversa. As for producing pdf files, i would suggest to have a look at the cairo library, a vector graphics libaray which support drawing into pdf surfaces.

Nonurban or natural features have a minimum polygon area of 40 acres 16 hectares with a minimum width of 20 feet 400 meters. Quadrilaterals are also sometimes called quadrangles or tetragons. What is the order of rotational symmetry of each of the following shapes. Types of polygons songs, videos, worksheets, games, examples. Using sketchpad we are able to construct shapes with rotational symmetries. A closed plane geometric figure in which all the sides are line segments. When a polygon has a small number of sides, there is a word you use instead of polygon. There are flat shapes with curves so they are not polygons. Now that we have learned the relationships between corresponding sides of similar polygons and the ratios of their perimeter and area, we can revisit the original problem that motivated our discussion. If i set the dpi to 1200 during the export to pdf the polygon shapes are retained much better, but the file size goes to 59 mb. Learn the definition of polygon a very important shape in geometry. A single shapefile represents features that are either point, line, or polygon in spatial data type. The minute hand of a clock moves a half turn from 4 to 10.

The solid plane region, the bounding circuit, or the two together, may be called a polygon. A polygon is a many sided closed figure comprised completely of line. A circle is not a polygon because it has curved sides. An icosagon is a 20 sided polygon with interior angles that add to 3240 degrees. Other types of items, such as a web map item, are automatically added to arcgis online when you create and save them through a related app or workflowfor example, creating a map in map viewer. This page examines the properties of twodimensional or plane polygons. Polygon features are two dimensional and therefore can be used to measure the area and perimeter of a geographic feature. The gis spatial data model university of washington. Printable regular polygon sheet in pdf format which includes picture and name of each of the 10 polygons from triangle, through to dodecagon.

In geometry, there are kinds of polygons which can be classified as the simplex or complex polygon, concave or convex polygon and regular or irregular polygon. All the angles are congruent in an equiangular polygon. In the index file, each record contains the offset of the corresponding main file record from the beginning of the main file. One angle measures greater than 90 degrees and less than 180 degrees which angle is an obtuse angle. This quiz is really fun and it will help you remember the names of the polygons on this lesson fast. A polygon is a closed plane 2d figure having three or more straight sides that intersect only at the vertices. An esri shapefile consists of a main file, an index file, and a dbase table. If you have privileges to create content, you can add many different types of content as items to arcgis online. Introduction to gis workbook university of maryland libraries. Now that youre an expert on 2d polygon shapes, try learning about cubes and other 3d polyhedron shapes. Pdf it has been the tradition with engineering, architecture, mathematics, building technology.

Dimension currently only supports polygon geometry. Explore all of the ways that you can position two intersecting paper strips or geostrips. See the common polygons pdf file worksheet for the names, characteristics, and classification of common polygons. Techtalk there are two kinds of data that can be viewed in arcgis vector and raster. Powerpoint presentation angles, triangles and quadrilaterals. For a polygon with straight sides this is the sum of all sides. A convex polygon is a polygon with all its interior angles less polygon are inside the polygon.

Polygons formulas pdf for the following formulas, n is the number of sides in the polygon and s is the length of each side. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. To find the perimeter of a polygon, add the lengths of the sides. Each angle is 360 n, where n is the number of sides of the polygon. Below is an example of an overlay of steep slopes, soils, and vegetation. Formulas for perimeter, area, surface, volume edited by joanna guttlehr, pin learning lab, 2007. Connected lines and polygon tool see example pdf and example pdfill project file this tool creates connected lines polyline or polygon comment on the pdf page. In the polygons the diagonal is a straight line inside a shape that joins two vertexes a, d but not a side. Information sheet geometricreasoningbigideasplaneshapespolygons. Polygons formulas pdf polygons formulas pdf polygons formulas pdf download. Both these tools let you place individual vertices in the scene view to define the shape of individual polygon faces. Polygons a polygon is a plane shape with straight sides. Regular and irregular polygons regular polygon is one whose sides are all equal and whose interior angles are all congruent. Discuss components of spatial data centers for disease.

This file contains additional information such as exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. Types of angle angles, lines and polygons aqa gcse. Such shapes include squares, rectangles, triangles and pentagons but not circles or any other shape that includes a curve. Honors packet on polygons, quadrilaterals, and special.

Shapefile data files can also be managed using operating system tools, such as the windows explorer. Work out the number of sides of the regular polygon. Most worksheets require students to identify or analyze acute, obtuse, and right angles. The perimeter of a polygon is the sum of the lengths of its sides. The shapefile standard is public, so any software can be made to read or write shapefiles. Permission is granted to copy, distribute andor modify this document under the terms of the gnu free documentation license, version 1.

For which bridge is the ratio of tower height to length of main span closest to 1. Polygons are multisided shapes with different properties. The explanation of why you can receive and acquire this geometry by jurgensen brown 5th edition sooner is that this is the scrap book in soft file form. There are also some members which are a subset of other members of this family. Introduction to polygons naming of polygon types naming of polygon types. Geometry monster glyph this project is to be completed once your students are familiar with the following.

For any polygon, the sum of the interior angles is always. A line through a convex polygon will intersect the polygon twice, as can be seen from the figure and divide the polygon into exactly two pieces. These printables cover a widevariety of topics, including polygons, circles, area, perimeter, coordinate planes, ordered pairs, lines, points, tessellation, and symmetry. Geometrically, polygons are related with their duals i. Rhombus is the dual polygon of rectangle and vice versa. If, otherwise, the polygon is said to be irregular polygon.


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